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/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup blf
*
* Workaround for win32 which needs to use BLI_fopen to access files.
*
* defines #FT_New_Face__win32_compat, a drop-in replacement for \a #FT_New_Face.
*/
#ifdef WIN32
# include <stdio.h>
# include <ft2build.h>
# include FT_FREETYPE_H
# include "MEM_guardedalloc.h"
# include "BLI_fileops.h"
# include "BLI_utildefines.h"
# include "blf_internal.h"
/* internal freetype defines */
# define STREAM_FILE(stream) ((FILE *)stream->descriptor.pointer)
# define FT_THROW(e) -1
static void ft_ansi_stream_close(FT_Stream stream)
{
fclose(STREAM_FILE(stream));
stream->descriptor.pointer = NULL;
stream->size = 0;
stream->base = 0;
/* WARNING: this works but be careful!
* Checked freetype sources, there isn't any access after closing. */
MEM_freeN(stream);
}
static ulong ft_ansi_stream_io(FT_Stream stream, ulong offset, uchar *buffer, ulong count)
{
FILE *file;
if (!count && offset > stream->size) {
return 1;
}
file = STREAM_FILE(stream);
if (stream->pos != offset) {
BLI_fseek(file, offset, SEEK_SET);
}
return fread(buffer, 1, count, file);
}
static FT_Error FT_Stream_Open__win32_compat(FT_Stream stream, const char *filepathname)
{
FILE *file;
BLI_assert(stream);
stream->descriptor.pointer = NULL;
stream->pathname.pointer = (char *)filepathname;
stream->base = 0;
stream->pos = 0;
stream->read = NULL;
stream->close = NULL;
file = BLI_fopen(filepathname, "rb");
if (!file) {
fprintf(stderr,
"FT_Stream_Open: "
"could not open `%s'\n",
filepathname);
return FT_THROW(Cannot_Open_Resource);
}
BLI_fseek(file, 0LL, SEEK_END);
stream->size = ftell(file);
if (!stream->size) {
fprintf(stderr,
"FT_Stream_Open: "
"opened `%s' but zero-sized\n",
filepathname);
fclose(file);
return FT_THROW(Cannot_Open_Stream);
}
BLI_fseek(file, 0LL, SEEK_SET);
stream->descriptor.pointer = file;
stream->read = ft_ansi_stream_io;
stream->close = ft_ansi_stream_close;
return FT_Err_Ok;
}
FT_Error FT_New_Face__win32_compat(FT_Library library,
const char *pathname,
FT_Long face_index,
FT_Face *aface)
{
FT_Error err;
FT_Open_Args open;
FT_Stream stream = NULL;
stream = MEM_callocN(sizeof(*stream), __func__);
open.flags = FT_OPEN_STREAM;
open.stream = stream;
stream->pathname.pointer = (char *)pathname;
err = FT_Stream_Open__win32_compat(stream, pathname);
if (err) {
MEM_freeN(stream);
return err;
}
err = FT_Open_Face(library, &open, face_index, aface);
/* no need to free 'stream', its handled by FT_Open_Face if an error occurs */
return err;
}
#endif /* WIN32 */
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